Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
The Wall Street Journal today reported that faulty wells, not fracking, is the most common source of water pollution linked to drilling for natural gas.
It suggested that stricter well-construction rules and cementing guidelines could improve safety. Such changes might also produce less resistance to drilling from grass-roots groups, the paper said.
It said there have been several instances of problems that are tied to wells that were not properly sealed with subterranean cement.
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